Stropping-machine.



F. A. SHIMANS.

STROPPING MACHINE.

APPLICATION FILED APR. 20. I916.

Patented Dec. 26, 1916.

In: NORRIS PEYERS cu. nmmumn wuumhmn, n, c.

FRANK A. SHIT/[A113, OF .CHIGAGQ'ILLI NOIS.

sraorrine-ivracnmn.

Specification of Letters Patent.

Patented Dec. 26,1916.

Application filed April 20, 1916. Serial No. 92,370. i

To all whom it may concern Be it known that I, FRANK A. SLIIMAINS, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful. Improvements in Stropping-Machines, of which the following is a specification. I I

My invention relates to improvements in stropping machines designed for use especially in the sharpening of circular razor blades.

The object of my invention is the production of a device of this character which will be of durable and economical. construction and efficient inuse.

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of parts hereinafter described and claimed. p

The invention will be best understood by reference to the accompanying drawing forming a part "of this specification, and in which, n 1 i Figure 1 is a front elevation of a stropping machine embodying the invention, Fig."

2 is a side elevation thereofli ig. 3 is a section taken on line .rm of Fig. 2, and Fig. 1 is a slightly enlarged section taken on line of Fig. 1.

The preferred form of construction, as illustrated in the drawing, comprises an elongated sharpening element 1 in the form of a leather strap or the like which is provided at its upper end with a wire loop 2 for attaching the same to a hook or other suitable supporting device. The lower end of said sharpening element is formed to constitute a handleo. At the upper and lower ends of the sharpening elementfare provided forwardly and laterally projecting arms a and 5 respectively, the arms 4 being formed integral with the loop 2, and the arms?) being the ends of a reinforcing wire which is embedded in the handle 3. The arms 4: and 5 serve as supports for flexible guides 6 which carriage is guided in its longitudinal movement. The pulleys 9 also constitute gears, being provided at their peripheries with teeth which engage with gears10 provided at the ends of ashaft 11 mounted in the carriage 7. The shaft 11 is adapted to support the circular razor blade 12 which it is desired to sharpen, the blade being removably secured thereto by means of'a bolt and nut fastening 13. To accommodate the blade,

one side of said shaft is flattened, as clearly shown in Fig. 4. The fastening 13 permits of rotatable adjustment of the blade, which adjustment may be effected by means of an arm 14 which is mounted at 15 in the car rlage for universal plvotal movement. The

inner end of arm 14s is provided with a shoe 16 of rubber or other suitable material which is adapted for engagement with the blade to effect partial rotation of the same upon manipulation of the outer end of said arm.

Provided at the upper and lower ends of guides 6 will exert a rotary pressure upon the shaft 11 which will serve to press one side of the periphery of the blade into engagement with the sharpening. element, the sidethus pressed into engagement with the sharpening element being the remote side of the blade relative to the direction in which the carriageis moved. For instance, when the carriage is moved downwardly, the position of the blade is that shown in Fig. 4. In the upward movement of the carriage the rotary pressure exerted upon the shaft 11 will be such as to press the opposite or lower side of the blade into engagement with the sharpening element. The respective ends of the guides 6 are inclined outwardly or away from the sharpening element so that as the carriage approaches the terminals of its movement, the same will automatically be moved away from the sharpening element and thus permit of revolving of the blade in order to present the opposite side of the same to the action of the sharpening element upon the return movement oi the carriage. The bladeis rotatably adjusted to present new portions of the periphery of the same for contact with the sharpening element by simply manipulating the arm 14:, as above described.

l/Vhile I have illustrated and described the preferred form of construction for carrying my invention into efiect, this is capable of variation and modification without departing from'the spirit of the invention. 1, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention what I laim as new and desire to secure by Letters Patent is:

1. A stropping machine comprising an elongated flexible sharpening element; longitudinally movable means for supporting a razor blade and holding the same in engagement with said sharpening element; and means carried by the blade supporting means for curving said sharpening element transversely, substantially as described.

2. A stropping machine comprising an elongated flexible sharpening element; a carriage movable longitudinally of said sharpening element; longitudinally extending guides for cooperation with said carriage; means on said carriage for supporting a razor blade and holding the same in engagement with said sharpening element; and means on said carriage engaging with said sharpening element for imparting transverse curvature to said sharpening element in the movement of said carriage, substantially as described.

3. A stropping machine for the sharpening of circular blades comprising an elongated flexible sharpening element; a carriage movable longitudinally of said sharpening element; longitudinally extending guides for cooperation with said carriage; means on said carriage for supporting a razor blade and holding the same in engagement with said sharpening element; and inwardly extending fingers on said carriage engaging under the longitudinal edges of said sharpening element for transversely curving said sharpening element adjacent the carriage, in the movement of the latter, to conform with the curvature of the periphery of the blade, substantially as described.

4. A stropping machine for the sharpening of circular blades comprising an elongated flexible sharpening element; a carriage movable longitudinally of said sharpening element; longitudinally extending guides for cooperation with said carriage; means on said carriage for supporting a razor blade and holding the same in engagement with said sharpening element; and inwardly extending fingers on said can riage engaging under the longitudinal edges of said sharpening element for transversely curving said sharpening element adjacent the carriage, in the movement of the latter, to conform with the curvature of the periphery of theblade, said guides being inclined outwardly at their ends to adapt the same, upon said carriage approaching the ends of said sharpening element, to move the same outwardly from said element to allow for revolving of the blade, substantially as described.

5. A stropping machine for the sharpening of circular blades comprising an elongated sharpening element; a carriage movable longitudinally of said sharpening element; means on said carriage for rotatab-ly supporting a razor blade and holding the same in engagement with said sharpening element; and means for rotatably adjusting said blade, substantially as described.

6. A stropping machine for the sharpening of circular blades comprising an elongated sharpening element; a carriage movable longitudinally of said sharpening ele ment; means on said carriage for rotatably supporting a razor blade and holding the same in engagement with said sharpening element;'and a pivotally mounted manuallyoperable arm for rotatably adjusting the blade, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK A. SHIMANS.

Witnesses:

JOSHUA R. H. Porrs, B. G. RICHARDS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

